malcher



O. MALCHER.

PRINTING MECHANISM FOR CALCULATING MACHINES.

APPLICATION FlLED APR. 29, 1918.

1,318,398. Patented 0m. 14,1919.

2 SHEETS-SHEET I.

WITNESS: IN E TOR.

' ATTORNEYS 0. MALCHER.

PRINHNG MECHANISM FOR CALCULATING MACHINES.

APPLICATION man APR. 29. ma.

1 ,3 1 8 ,398. latentwl Oct. 14, 1919.

2 SHEETSSHEET 2- W] TNE SS.

a IZVEiTORs; mw 4 A TTORNEYS cf she present plication Serial No o'r'ro mlnennn, or cHIeAGe jirmmm eeaemge Ze of; the "w i s w vision fiffmee operation. I I, H A V The invention is r xemplifi m the; com- 1 binetioe end arrangemeht pff "paitefshown ili in? "ammpa y gi QSh'R W: nd r 11 scribed in the followjifl 'speci' 021M011, aildfit is mqm ei't u e y Q1 infil P31 p n} flfhe el sla p, p i ting; mech iii m .7 t 3 5? t er b t pr nt nv ntib f s, p i comprises 5 casin '1 ha ving' al plilt alit slides 2 suppol pe therein {by eto'es she "3 each sIidebeing ppdyi ded with a, 5' ring? tending to dr w he i e! i ef viewed in 2," Lockin m chaniem for holding the s o f -h e in ll en m p qY' e wi h e i' s f'k" f. W11; i ea 'bejfiee es e ment of the'cqrtespbhdin fi H J leased by its lockingine aljl 'isml Thefe ai'e nine keys for each bar and the' nmbliqtoff movement of the bar: 2 will depend ipontl'ie' pert ieu la lykey depressed. Eechsefi of keys rack teeth "foxf opefating one the Emits of a computing device, Thi egeneral methdd' &

gmde 15 1a tmmimrwim in 'a'nn =18 whichwis jeurnaled" *on" the' sham: 13. m eke joint aweeneadlhi 1100 type egment f1 type segments 17 about the shaft 13' which movement is proportionate to the movement of the slide 2 and is regulated by the denominational key depressed. As shown in Fig. 4, the segment 17 is provided with outstanding ribs 20. Each type 21 is provided with a neck or extension 22 which at its terminal is offset to form a shoulder 23. The extensions 22 of the type rest between the ribs 20 of the segments 17 and bear against the face of the body of the guides 15. The type of each order are held in position by the next adjacent guide 15 wlth the exception of the type key depressed into the plane of the printing. line and also into alinement with the cooperating hammer slots 25 of the guides 15. When the hammers are released in the manner to be explained, they will operate the type so set and move them forwardly against the ribbon and the platen to record the digits on the particular type in the printing line. This provision of independently movable type eliminates all lead from the hammers an decreases the jar againstthe platen. It will be noted from Figs. 1 and 2, that normally all of the type, except the lowermost one, are located above the hammer slots 25 but that the lowermost or zero type is normally in the plane of the printin line and hence if all the hammers are re eased without previously moving any of the segments 17 a series of zeros will be recorded.

Extending transversely across the casing 12 is a pair of shafts or supporting rods 26 upon w "ch hammers 27 are mounted for reciprocation. Each hammer is operated by a spring 28 which,.under normal conditions, is placednnder tension tending to thro the hammer toward the platen. At the forward tern-final of each hammer is a hook 29, Fig.3; which projects into the hammer slot 25 of the alined type guide 15. As the coiiperatmg segment is swung downwardly by the action of the slide 2. the shoulders or noses 23 upon the type of that segment will be drawn through the hammer hook 29and said book will engage one of noses of the type at any of the adjusted positions of the segment 17. Under normal onditions the hammer hooks 29 each engage the coiiperating zero type and hence 2 if there is no adjustment of tho limphjng allhammers operated will print zeros.

provlded for the units denominational order which are held in piece by a.

printing unit which unit consists of a series of type 21; a guide 15 and segment 17.

-Each hammer is provided, at its rear end, with a primary lock shoulder 30 and intermediate its ends with a secondary lock shoulder 31 which is in the form of a tooth having one side thereof beveled or sloped. A hammer lock shaft 32 is mounted under the hammers 27 adjacent to the primary lock shoulders 30 and is interposed between the walls of the casing. A bell crank 33 is mounted upon the hammer lock shaft 32 and has the tail 3-1 thereof contacting with a cam 35 mon ted upon the secondary drive shaft 9. As 1; is hell crank 33 is keyed to the hammer lock shaft 32, oscillation of the bell crank by the cam when the secondary drive shaft is rotated will oscillate the hammer lockshaft32. The opposite arm of the bell crank 33 is bent at right angles to the bod thereof and extends in front of all of t e primary lock shoulders 30 and holds the hammers against the action of their cooperating springs 28. Loosely mounted upon the hammer lock shaft 32 are a plurality of bell cranks 36. Each bell crank has one arm 37 thereof located vertically and the opposite arm 38 thereof horizontally, the arm 38 being provided with a tooth 39 at its terminal which engages the secondary lock shoulder 31 of the adjacent hammer. One side of the vertical arm 37 of the boil crank is provided with an out wardly rojecting in 40 while a lip 41 extends rom the ot or side of said arm in the same horizontal plane as the pin 40. Each bell crank is acted upon by a spring 42 to hold the tooth 38 in engagement with the coiiperating secondary lock shoulder 31 of the cooperating hammer. In this way the pin 40 of one hell crank 36 operates against the lip 41 of the next adjacent bell crank of a lower denominational order. Each extension 10 of the slides 2 is rovided with a shoulder 43 which is alined with the extremity of the arm 37 of the cooperating bell crank of that order.

. ...,As the slides 2 move forwardly the extensions 10 thereof move with them setting the corresponding segments 17 of the printing mechanism to bring the proper type into the plane of the printin line to correspond to the key depressed. 'T llS movement of the slides causes the shoulders 43 of the extensions 10 of the operating slides to contact with the alined vertical arms 37 of the bell cranks 36 and more said bell cranks against the tension of the springs 42. As the slides remainin their forward position during the operation of the primary drive shaft 8 and the first part of the rotation of the secondary drive shaft 9. the bell cranks 36 are held in this position thus freeing the hammers corresponding to the slides which are moved while tie slides'are in'their forward posi tion and before they are restored The restoration of the slides to their inoperative position is accomplished during the latter part of the rotation of the secondary drive shaft 9' and the printing operation must therefore be completed during the first part of the rotation of the secondary drive shaft.

. It will be seen from Fig. 2 that the bell crank 33 is held in position to restrain the hammers 27 by the cam 35 but that at the ver beginning of the rotation of the seconc ary drive shaft the tall 34' of the bell crank 33 will 'be released to permit the hammers 27 to move forwardl under the tension of their springs 28. he shape of the cam 35 is such that almost immediately after the hammers have been permitted to move forwardly they will be returned by the bell crank 33, the tail 34 of which is restored to its initial position by the cam immediatel following the release of the tail to perm1t the forward movement of the hammers. Thus each hammer released by the bell cranks 36 will be reciprocated under the influence of its spring 28 to drive the type set to cotiperate with the hook 29 thereof against the ribbon to record a digit. The hammers which are not released by the bell cranks 36 for the reason that the corresponding slides have not been operated are held in their retracted position against the influence of the springs 28 by said bell cranks. The cam surface of the cam 35 is of such a length that as soon as a record has been made by the type, the tail 34 of the bell crank 33 rides upon the body of the cam and thereby oscillates said bell crank to return all of the hammers released to their normal and inactive positions, as illustrated in. Fig. 2.

It is desirable and is the practice in fue chines of this character to print zeros at the right of the digit of the lowest order recorded and to accomplish this the pins 40' and lips 41 are provided. If the bell. crank 36 of the hnndredths denominational order is operated by its coiiperating slide 2 and the slides of the tens and units denominational orders are not operated to present a different denominational order and oscillate the hell crank 36 about the hammer lock shaft 32 to release the hammers of both the tens and units denominational orders. Hence when the bell crank 33 is oscillated about the hammer lock shaft 32, these hammers of the tens and units orders will be free to move under the influence of their cotiperating springs 28 to drive the zero type toward the platen, thereby recording zeros without an adjustment of the segments 17. When I e slides 2 are returned to their normalfand inactive positions, the extensions 10 thereof will move rearwardly of the machine swinging all adjusted so ments 17 back to their initial positions and t is will perm-it the bell cranks 36 which have been adjusted, to be moved by the springs 42 into engagement with the secondary lock shoulders 31. 'Prior to this,

however, the printing operation has"bcen completed as described and all of the hammers 27 which have been released have been returned to their original positions by the cam 35 operating against the tail 34 of the bell crank 33.

It should be noted that thetype 21 are supported independently of the hammers 27 and that they are shifted into the printing position by mechanism independent of the printing hammers. When a particular type is brought into printing position the hammer is interlocked with that articular type and remains connected with t e type during the printing operation and moives the ty e forwardly to cause an impressi to be ma e upon the record sheetand also positively withdraws the type after the impression has been made. This makes itnfinecessary to provide each individual type with a spring or other device for returnin [it after 1t has been struck by the printing iammer.

I claim:

l. The combination with n plurality of guides, of segments reci rodatlng between said guides, type carried byysaid segnu-nts and held in place therein said guides, and hammers arranged ttbselectively cooperate with said type.

2. The combination with guides, of a pin ralify of type holders movable independent- 1y of one another relatiye to said guides, type carried by said holders, and hammers arranged to successivelytinferlock with said type as said holders arefggnioyedalong their guides. p

3. The combination with a plurality of guides, of segments coiil ie rating with said guides, a plurality of'rlreciprocal type carried by said segments the held in place therein by said guides; a'nd hammers arranged to engage said tiv licund to reciprocate the same within said segments.

4. The combination with a movable type holder, of individually movable type carried thereby, and hammers arranged to success 'ried by said type shifting member, a hammer arranged to successively engage said type as they are moved by said member, and rigid means on said guide for holding said type in retracted position.

7. The combination with a piurality of guides each having a hammer siot therein, of segments operating between said guides, individually movable type carried by said segments, and hannners extending into said hammer slots and arranged to successively engage said type upon the adjustment of said segments and to reciprocate one of said type after the completion of said adjustment.

8. In a printing device for calculating machines, a series of type members, a hammer for o crating said type members, means for selectively holding said hammer in locking engagement with said members and means for operating said hammer to cause a type member engaged thereby to produce an impression.

9. In a printing device for calculating machines, a series of type members, a hammer for operating said type members, means for shifting said type members into lockin engagement with said hammer, and rigi means for holding said type members in retracted position when not in engagement with said hammer.

10. In printing mechanism for calculating machines, a series of mov'abjte type-.members,

a hammer for operating said type members to roduce printed "impressions, means for shi ting said type. members successively into locking engagement with said hammer, and rigid means for hoiding in retracted position the type members which are not in engagement with the hammer.

11. In combination, a reciprocating hammer, a type member, means for shifting said type member into and out of operative engagement with said hammer, mechanism for operating said hammer to cause a type member connected therewith to produce a printed impression, and means for connecting said hammer and type member wlien in engagement with one another so that said type member will be moved in unison with said hammer in either direction of movement of said hammer.

12. In printing mechanism for calculating machlnes, a hammer, means for reciprocatng sa1d hammer, a type member movable mto and out of engagement with said hammer and operable by said hammer when in engagement therewith to produce a printed impression, and means on said hammer for retracting said type member after a print- 1ng operation.

13. The combination with a reciprocating hammer, of a series of type members, means for shifting said type members to bring them successively into operative relation with said hammer, means for reciprocating said hammer to cause a type member coiiperating therewith to produce an impresslon, and means on said hammer for engaging a type member when in operative relation with said hammer to cause said type member to move in either direction 1n unison with said hammer.

14. In combination, a bar, a series of type connected with said bar and slidable thereon, a printing hammer, means for holding said type in retracted position and means for shifting said bar to bring said type selectively into operative relation with said hammer and into engagement with said holdin means when not in operativerelation wit said hammer.

15. In combination, a bar, a series of type connected with said bar and slidable thereon, a hammer for operating said type to cause said type to produce printed impressions, means for shifting said bar to bring said type successively into operative relation with said hammer, means on said bar for forming an interlocking en agement with said type, and means for holding said type in retracted osition when not in engagement with sai hammer.

16. In combination, a type shifting bar, a

series of type slidably connected with said bar, a hammer for operating said type to cause said type to produce printed impressions, means for shifting said bar to suece'ssively'bring said type into engagement with said hammer, means on said hammer for holding said type to move in unison with said hammer but arranged to permit movement of said type into and out of engagementwith said hammer, and means for holding said type in retracted position when out of engagement with said hammer.

17. The combination with a series of type members, of a guide therefor, a reciprocab,

ing hammer for said t pe members, means on said guide for hol ing said type members in retracted position when said type members are out of operative engagement with said hammers, means for successively shifting said type members into 0 erative engagement with said hammer, an means on said hammer for interlocking with said type as they are shifted into operatlve rela;

tion thereto, such interlocking means beingarrnngerl to cause said type to move in unison with said Immmerm one direction to make an impression and in an opposite di-- rection to retract said type after the impression has been made. V V

18. v In printing mechanism for ealeuieting 1g machines, a piurality'of inovabletype inemhers, a hammer for operating suid type members, means for shij V hers to bring them 'sel fiifii engagement with said hammer;

hammer for engagin salt]. type members'to move said type me n ers 1n one direction to produce a printed impression and to retract :Etmgseid typemem.

' 1 neefi amsjrn for re 15 elprocating said hammer and means on sand said type members when said hammer is rwiproeated in an opposite direction.

19. The combination with a seriesof ty )0 members, and a hammer for-olmrhting'zuti members, said henmier and type-meantime having interfitting portions thereon airvranged to slide into and out of engagement o'r'ro MALCHER. 

